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JACOB EDSON, 0F BOSTON.,y MASSACHUSETTS.

' Latem Patent No. 70,820, daad member 12, 18er.

IMPROVEMENT IN GAPSTANS.

TO ALL WHOM IT MAY CONGERN:

Be it known that I, JACOB EDsoN, of Boston, in the county of Suolk, and Stato of Massachusettshave invented certain new and useful Improvements in Capstans; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon. l

The nature of my invention consists, first, in the mannerof holding the centre-pin in its base; second, in the arrangement of the several bearings of the capstan; third, in extending the flee-ting cleats above the joint that is between the head and body of the capstan; fourth, in constructing the head and ca`p of a single piece.

lTo enable others skilled in the art to make and use my invention, I will proceed to describe its construction and use. In the drawings- Figure 1 is an elevation of my improved capstan.

Figure 2 is a vertical section of .the same.

Figure 3 is awertical section of part of the same.

Figure 4 is a plan of the same.

The fixed base A of my eapstan is made of any suitable metal, in form as shown in section in iig.' 2;'.

formed essentially of two cone-shaped disls, the lower one being reversed, so as :to leave between it and the upper one the annular chamber C, g. 2. The object of so constructing the base is to give a strong bearing for the centreepn H, and still to h avc the', base light. It will be seen from inspection. of iig. 2, that I obtain the advantages ofya long bearing for the centre-pin H, and still make the base quite light. D D, iig. 2, represents an annular bead running around the top oi' the base, thus forming a kind of truck in which the circular bearing D of the capstan rests. Into thecut mentioned above, oil or any other unguent may be placed to lessen the lfriction caused by the weight of the capstan; F F fig. 2, represents an annular recess made in E to'reeeive B'abbit orany other metal suitable for journaleboxes. N represents the li'e'a'd and'v cap of the capstan, and is Y fastened to tho main body by means of the ears P and bolts O, iig. 8. I, iig. 2, is a screw or pin passing through the top of the head and down into the spindle H. This screw being smooth on that part which cornes invcontaet with N, serves as an upper bearing or journal for the capstan to revolve upon. It desirable, the upper end of the spindle H may be made small,so as to pass through the cap N, and being provided with a nut, thus form an upper bearing for the capstan. By so arranging a capstan that the upper bearing may be made in the upper part of the head,'I secure the advantages of a long distance between bearings, and at the same time have a low or short capstan. The screw-pin I, being provided with a flat head, serves to hold the revolving partici' the eapstan to the base; o1' in case the standard is turned down, the nut screwed upon its top would servethe sume purpose as the head of the screw I.. K K represents peculiarly-shapedv recesses made into the head of the capstnn to receive the ends of the capstan-bars. The form of these recesses is very nearly that of a cylinder having 'a diagonal piece cut from one end. L L, figs. 1 and 2,' represent small channels running into the recesses K K, which they serve to drain. M M, fig. 1, represent fleeting cleats, the upper end of which, M M', extends upwards from the lower part or body of the c'apstan beyondl the joint, between the body and the head, so as to enlarge the fleetingy surface. In other words, to provide more available lengtlrof capstan, and still not enhance its total height. 'It will bc observed, as one of the features of my capstan, that the headand cap form but a single piece.

Having thus described my invention, I will proceed to set forth my claim.l

What I claim a3 my invention, and desire to secure by Letters Patent, is-

1. Constructingl the base of two cone-shaped disks or shells, one of which is reversed so as to give double bearings, B B and B B', for the standard or spindle H.

2. The ungucnt-receptacle at the top of the base, and surrounding the standard or spindle H, made substantially as and for the purpose set forth.

3. The extending of the eeting cleats above -the joint which separates the head from the body of the.

capstan, substantially as described and for the purpose set forth.

4. Combining with the bodyof the capstan the head and cap N, made in one piece, substantially as and for the purpose set forth.

5. In placing the upper bearing of the capstan in the top of the cap or head N, substantially as and for the purpose set forth. i i

6. The combination of the 'draining pipes L L with the receptacles K K, substantially as described an'd for the purpose set forth.

JACOB EDSON.

Witnesses:

F. G. P ARKER, Gr. Gnonenu. 

